CN213936528U

CN213936528U - Broadband antenna assembly

Info

Publication number: CN213936528U
Application number: CN202023016142.7U
Authority: CN
Inventors: 张方方; 吴林; 穆宇; 吴开候
Original assignee: Lanto Electronic Ltd
Current assignee: Lanto Electronic Ltd; Kunshan Liantao Electronics Co Ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-08-10
Anticipated expiration: 2030-12-14

Abstract

The embodiment of the utility model discloses wide band antenna module. The utility model discloses wide band antenna module's radiation arm has interconnect's low frequency radiation arm and medium frequency radiation arm, low frequency radiation arm and medium frequency radiation arm all extend to the other end from the one end of connecting, and the width through setting up the low frequency radiation arm is along with the extending direction gradual change, makes the gap width between the medium frequency radiation arm of low frequency radiation arm and syntropy extension also along with the extending direction gradual change simultaneously. Therefore, the function of self-impedance gradual transformation can be realized, the resonance effect is good, the return loss is small, and a wider frequency range can be provided.

Description

Broadband antenna assembly

Technical Field

The utility model relates to the field of communication technology, concretely relates to wide band antenna module.

Background

With the rapid development of communication technology, especially the popularization of intelligent mobile terminal products, the required antenna design gradually develops towards the direction of built-in multi-frequency.

The radiation frequency band of the antenna is changed along with the shape of the radiation unit of the antenna, and some technical schemes of broadband antennas also appear in the prior art, and the bandwidth of the antenna is expanded by various impedance matching methods, such as an asymmetric technology, a tridentate matching network and other methods, but the tuning effect is not ideal enough, the reflection parameter is poor, and partial functions are limited.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a wideband antenna assembly, which has better resonance effect and lower return loss in different frequency bands.

The utility model discloses wide band antenna module includes:

the radiation arm comprises a low-frequency radiation arm and two intermediate-frequency radiation arms which are connected with each other, the low-frequency radiation arm extends from one end connected with the intermediate-frequency radiation arms to the other end opposite to the low-frequency radiation arms, the low-frequency radiation arm has a gradually-changed width along the extending direction, and a gap between the low-frequency radiation arm and the two intermediate-frequency radiation arms has a gradually-changed width;

a gap is arranged between the grounding arm and the radiation arm; and

a coaxial line electrically connected with the radiating arm and the grounding arm, configured to feed power to the radiating arm and the grounding arm.

Preferably, the broadband antenna assembly further comprises a substrate, and the radiating arm and the grounding arm are arranged on the top surface of the substrate.

Preferably, the radiating arm and the grounding arm are formed by a metal plate.

Preferably, the low-frequency radiating arms become gradually wider in the extending direction, and the two medium-frequency radiating arms become gradually narrower in the extending direction.

Preferably, a gap between the low frequency radiation arm and the two middle frequency radiation arms becomes gradually wider along an extending direction.

Preferably, the adjacent edges of the low frequency radiating arm and the two mid frequency radiating arms have a curvature towards the inside of the broadband antenna assembly.

Preferably, the adjacent edges of the low frequency radiating arm and the two medium frequency radiating arms are smooth, serrated or stepped.

Preferably, the coaxial line has a middle conductor and an outer braided layer, and the distance between the middle conductor and the outer braided layer is determined according to the design performance of the broadband antenna component.

Preferably, the substrate is an epoxy board or a flexible circuit board.

Preferably, the broadband antenna assembly further comprises a housing, and the bottom surface of the base material is fixedly connected with the housing through glue or screws.

The embodiment of the utility model discloses wide band antenna module. The utility model discloses wide band antenna module's radiation arm has interconnect's low frequency radiation arm and medium frequency radiation arm, low frequency radiation arm and medium frequency radiation arm all extend to the other end from the one end of connecting, and the width through setting up the low frequency radiation arm is along with the extending direction gradual change, makes the clearance broadband between low frequency radiation arm and the medium frequency radiation arm of syntropy extension also along with the extending direction gradual change simultaneously. Therefore, the function of self-impedance gradual transformation can be realized, the resonance effect is good, the return loss is small, and a wider frequency range can be provided.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a top view of a broadband antenna assembly according to a first embodiment of the present invention;

fig. 2 is a side view of a broadband antenna assembly according to a first embodiment of the present invention;

fig. 3 is a return loss diagram of a wideband antenna assembly according to a first embodiment of the present invention;

fig. 4 is a top view of a broadband antenna assembly according to a second embodiment of the present invention;

fig. 5 is a side view of a broadband antenna assembly of a third embodiment of the present invention;

description of reference numerals:

1-a substrate; 2-a radiation arm; 21-a low frequency radiating arm; 22-medium frequency radiating arm; 3-a grounding arm; 4-coaxial line; 41-terminal; 42-a middle conductor; 43-outer layer weaving layer; 5-a shell.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout this specification, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a wideband antenna assembly according to a first embodiment of the present invention. As shown in fig. 1, the embodiment of the present invention includes a radiation arm 2, a grounding arm 3, and a coaxial line 4.

The radiating arm 2 is configured to radiate an electrical signal. The radiating arm 2 includes a low frequency radiating arm 21 and two intermediate frequency radiating arms 22 connected to each other and extending from the connected end to the opposite end, that is, the low frequency radiating arm 21 and the two intermediate frequency radiating arms 22 are connected at end a and extend from end a to end B. The low-frequency radiating arms 21 are gradually widened along the extending direction from a to B, the widest position is substantially equal to the width of the end a, and the two medium-frequency radiating arms 22 are gradually narrowed along the extending direction from a to B. In the present embodiment, the radiation arm 2 is formed in an axisymmetric shape, that is, the low frequency radiation arm 21 is symmetrically funnel-shaped, and at the same time, the medium frequency radiation arm 22 is symmetrically disposed at both sides of the low frequency radiation arm 21.

Further, the edges of the low frequency radiating arm 21 adjacent to the two mid frequency radiating arms 22 have a curvature towards the inside of the broadband antenna assembly. That is, the adjacent edges of the low frequency radiation arm 21 and the two intermediate frequency radiation arms 22 in the extending direction of a to B are continuously changing curves. The shape design is beneficial to widening the bandwidth of the broadband antenna component. Further, the curvature of the curve becomes gradually larger.

Further, a gap exists between the low frequency radiating arm 21 and the two intermediate frequency radiating arms 22, and the gap gradually widens in the extending direction of a to B. The width and length of the gap are determined according to the design performance of the broadband antenna component, and influence the frequency tuning and impedance performance of the broadband antenna component.

In the present embodiment, the edges of the low frequency radiating arm 21 adjacent to the two medium frequency radiating arms 22 are smooth curves. Alternatively, the four opposing edges may be provided in other shapes, such as serrated or stepped, etc.

The ground arm 3 is configured to form a ground plane and to generate current oscillations in cooperation with the radiating arm 2. In the present embodiment, the grounding arm 3 is disposed on the same plane as the radiating arm 2, and is adjacent to the a end of the radiating arm 2. The width of the grounding arm 3 is substantially equal to that of the radiating arm 2, and a gap with a certain width is formed between the grounding arm and the radiating arm 2. As shown in fig. 1, the gaps have the same width.

The coaxial line 4 is configured to conduct electrical signals, i.e. feed, to the broadband antenna assembly. Coaxial wire 4 includes a terminal 41, a middle conductor 42, and an outer braid 43. Wherein the terminal 41 is fixedly connected to one end of the coaxial line 4 and, in use, is soldered to a radio frequency port of a circuit or module to be serviced. The outer layer weaving layer 43 and the middle conductor 42 are arranged at the other end of the coaxial line 4, the outer layer weaving layer 43 is connected with the radiation arm 2 in a welding mode, a welding point is close to the end A, the middle conductor 42 is connected with the grounding arm 3 in a welding mode, and the welding point is close to one side, adjacent to the end A, of the grounding arm 3. Alternatively, the distance between the middle conductor 42 and the outer braid 43 is determined according to the design performance of the broadband antenna assembly, and the position change can change the impedance matching and the resonant frequency point of the broadband antenna assembly.

Fig. 2 is a side view of a wideband antenna assembly according to a first embodiment of the present invention. As shown in fig. 2, in the present embodiment, the broadband antenna assembly has a substrate 1. The substrate 1 may be an epoxy board or a flexible circuit board. The radiating arm 2 and the grounding arm 3 are now arranged on the top surface of the substrate 1. The bottom surface of the substrate 1 is fixedly connected with the shell 5 through glue or screws. Specifically, the radiation arm 2 and the ground arm 3 may be metal patterns formed on an epoxy board or a flexible circuit board. The metal material may be copper or silver.

Fig. 3 is a schematic return loss diagram of the wideband antenna assembly according to the first embodiment of the present invention. As shown in fig. 3, the x-axis of the coordinate axis is the frequency of the wideband antenna assembly, and the y-axis is the return loss of the wideband antenna assembly. The working frequency band of the return loss of the broadband antenna component of the embodiment below-10 dB is 0.7 to 5.9GHz, and the broadband antenna component has good broadband characteristics and radiation characteristics and meets the use requirements under the actual situation.

Fig. 4 is a top view of a broadband antenna assembly according to a second embodiment of the present invention. As described above, the low frequency radiating arm 21 and the two intermediate frequency radiating arms 22 may be formed in other shapes. For example, one portion of the edge may be formed in a curved line and the other portion of the edge may be formed in a zigzag or step shape. Also for example, all of the opposing edges may be formed in a zigzag or step shape. The edges of different shapes may or may not be adjacent. As shown in fig. 4, a part of the edge 21a of the low frequency radiation arm 21 is formed in a step shape, and at the same time, the edge 22a of the intermediate frequency radiation arm 22 opposite thereto is also formed in a step shape. Meanwhile, the edge 22b of the intermediate frequency radiation arm 22 is formed in a zigzag shape. The change in edge shape can further broaden the bandwidth while better ensuring impedance tuning at different frequencies.

Fig. 5 is a side view of a broadband antenna assembly according to a third embodiment of the present invention. As shown in fig. 5, in the present embodiment, the broadband antenna assembly may also be formed without the base material 1, and the radiating arm 2 and the grounding arm 3 are formed by metal plates and directly and fixedly connected to the housing 5, in which case, the medium under the radiating arm 2 and the grounding arm 3 is air. This can make the antenna performance different from the antenna assembly with a specific substrate disposed underneath, changing the performance of the broadband antenna assembly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A broadband antenna assembly, comprising:

the radiating arm (2) comprises a low-frequency radiating arm (21) and two intermediate-frequency radiating arms (22) which are connected with each other, the low-frequency radiating arm (21) extends from one end connected with the intermediate-frequency radiating arms (22) to the other end opposite to the low-frequency radiating arm, the low-frequency radiating arm has a gradually changed width along the extending direction, and a gap between the low-frequency radiating arm (21) and the two intermediate-frequency radiating arms (22) has a gradually changed width;

a gap is arranged between the grounding arm (3) and the radiation arm (2); and

a coaxial line (4) electrically connected with the radiating arm (2) and the grounding arm (3) and configured to feed the radiating arm (2) and the grounding arm (3).

2. The broadband antenna assembly of claim 1, further comprising a substrate (1), wherein the radiating arm (2) and the grounding arm (3) are disposed on a top surface of the substrate (1).

3. The broadband antenna assembly of claim 1, characterized in that the radiating arm (2) and the grounding arm (3) are formed by sheet metal.

4. The broadband antenna assembly of claim 1, wherein the low frequency radiating arm (21) is gradually wider in extension direction and the two mid frequency radiating arms (22) are gradually narrower in extension direction.

5. The broadband antenna assembly of claim 1, wherein the gap between the low frequency radiating arm (21) and the two mid frequency radiating arms (22) widens progressively in the direction of extension.

6. The broadband antenna assembly of claim 1, wherein the adjacent edges of the low frequency radiating arm (21) and two mid frequency radiating arms (22) have a curvature towards the interior of the broadband antenna assembly.

7. The broadband antenna assembly of claim 6, wherein the adjacent edges of the low frequency radiating arm (21) and the two mid frequency radiating arms (22) are smooth, jagged or stepped.

8. The broadband antenna assembly of claim 1, characterized in that the coaxial line (4) has a middle conductor (42) and an outer braid (43), and the distance between the middle conductor (42) and the outer braid (43) is determined according to the design performance of the broadband antenna assembly.

9. The broadband antenna assembly of claim 2, characterized in that the substrate (1) is an epoxy board or a flexible circuit board.

10. The broadband antenna assembly of claim 2, further comprising a housing (5), wherein the bottom surface of the substrate (1) is fixedly connected to the housing (5) by glue or screws.